<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Test01</title>
</head>
<body>
<script type="text/javascript">
    console.log(Math.trunc(88.123));
    console.log(Math.trunc(-88.123));
    console.log(Math.trunc(-88.888));

    console.log(Math.sign(8));
    console.log(Math.sign(0));
    console.log(Math.sign(-8));

    console.log(Math.cbrt(8));

    console.log(2 ** 10);

</script>
</body>
</html>